A-weighted sound pressure level spectrogram (plot_VS_ASPL_spectrogram)

Post-processing documentation
Matlab commandplot_VS_ASPL_spectrogram
Module VS.pp
Description PLOT_VS_ASPL_SPECTROGRAM draws the A-weighted acoustic noise sound pressure level spectrogram at 1m (variable speed SPL spectrum)
Parameters
Restrictions
See also A-weighted sound power level spectrogram (plot_VS_ASWL_spectrogram) A-weighted sound pressure level (SPL) at variable speed (plot_VS_ASPL_overall) A-weighted sound pressure level spectrum (plot_ASPL_fft)

Result

This MANATEE software post processing draws the acoustic noise spectrogram in term of sound pressure level.

It gives the following graph on default simulation project:

A-weighted sound pressure level spectrogram at 1 m
A-weighted sound pressure level spectrogram at 1 m
plot_VS_ASPL_spectrogram

One can see in this example that a strong resonance occurs due to coincidence between a magnetic force excitation of wavenumber r=2 with the ovalization mode of the stator stack (2,0).

Note that you can change some plot options of all default MANATEE post processings (e.g. axis limits, colormaps).

This graph help identifying the acoustic noise resonances occuring during variable speed operation of electrical machines.

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